Issue #3414287 by catch, longwave: Avoid reading session from the database multiple times during a big pipe request

Issue #3379885 by catch, Wim Leers: Use MessagesCommand in BigPipe to remove special casing of the messages placeholder

Issue #3377570 by catch, Wim Leers, mglaman, marcelovani, Kingdutch: Add PHP Fibers support to BigPipe

Issue #956186 by catch, dpolant, SteffenR, yhahn, lauriii, nod_, sokrplare, rwaery.11, Supreetam09, effulgentsia, geek-merlin: Allow AJAX to use GET requests

Issue #2632750 by Wim Leers, bnjmnm, krlucas, ronaldtebrake, zaporylie, mherchel, Fabianx, webchick, yogeshchaugule8, catch, darol100, yoroy, Bojhan, Gábor Hojtsy: Interface previews/skeleton screens through optional "preview" or "placeholder" templates

Issue #3209723 by murilohp, daffie, longwave, andypost: [Symfony 6] Symfony\Component\HttpKernel\HttpKernelInterface::MASTER_REQUEST is deprecated, use ::MAIN_REQUEST instead

Issue #3222769 by bbrala, alexpott, longwave, Matroskeen: [November 8, 2021] Replace all list (array destructuring) assignment to the array syntax

Issue #3222251 by bbrala, longwave: [November 8, 2021] Replace all isset constructs with the null coalescing operator

Issue #3238941 by andypost, daffie: \Drupal\big_pipe\Render\BigPipe::splitHtmlOnPlaceholders() causes deprecation errors on PHP 8.1

Issue #3209617 by longwave, daffie, catch: [Symfony 6] Symfony\Component\HttpFoundation\RequestStack::getMasterRequest() is deprecated, use getMainRequest() instead

Issue #3161983 by catch, longwave, Pooja Ganjage, sanjayk, daffie, Kristen Pol, dww, Gábor Hojtsy: [Symfony 6] Update EventDispatcherInterface type hints in constructors

Revert "Issue #3161983 by Pooja Ganjage, sanjayk, catch, longwave, daffie, dww, Gábor Hojtsy: [Symfony 6] Update EventDispatcherInterface type hints in constructors"

This reverts commit a9cee683.

Issue #3161983 by Pooja Ganjage, sanjayk, catch, longwave, daffie, dww, Gábor Hojtsy: [Symfony 6] Update EventDispatcherInterface type hints in constructors

Issue #2851394 by GoZ, hgunicamp, oknate, jungle, wolffereast, tameeshb, mmatsoo, ridhimaabrol24, jofitz, swarad07, tanc, shaktik, dimaro, shashikant_chauhan, MerryHamster, quietone, nitesh624, martin_q, boaloysius, gaurav.kapoor, nitvirus, ankithashetty, Munavijayalakshmi, kostyashupenko, leolando.tan, amit.drupal, ravi.shankar, akashkrishnan01, Swapnil_Kotwal, Saviktor, mrinalini9, anmolgoyal74, Venkatesh Rajan.J, shimpy, lomasr, Dinesh18, shubham.prakash, mahtab_alam, markdorison, cilefen, longwave, bleen, xjm, alexpott, gmaltoni: Fix grammar 'a' to 'an' when necessary

Issue #3055194 by catch, mikelutz, longwave, mkalkbrenner, hchonov: [Symfony 5] The signature of the "Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher::dispatch()" method should be updated to "dispatch($event, string $eventName = null)", not doing so is deprecated since Symfony 4.3

Issue #3094398 by martin107, alexpott, andypost, klausi: Update Symfony response and request events to new classes

Issue #2981584 by Wim Leers, JvE, ndobromirov: BigPipe breaks on large amounts of placeholders (e.g. Flag module on view displaying ~1000 entities)

Issue #2935256 by Jo Fitzgerald, voleger, kim.pepper, ibustos, Yogesh Pawar, catch, jibran: Remove all usages of drupal_get_message and drupal_set_message in modules

Issue #2853503 by Aki Tendo, alexpott, larowlan, Wim Leers, klausi, fgm, dawehner, mondrake, catch, Berdir, neclimdul, borisson_: Remove all assert('string') calls from Drupal core because deprecated in PHP 7.2

Issue #2901562 by mfernea, Jo Fitzgerald, Yogesh Pawar, 3ssom, Mile23, borisson_: Fix 'Squiz.WhiteSpace.SuperfluousWhitespace' coding standard

Issue #2803779 by pfrenssen, klausi, Mile23, alexpott, dawehner: Update Coder to 8.2.10 and fix errors from improved sniffs

Issue #2657684 by Wim Leers, Fabianx, xjm, effulgentsia: Refactor BigPipe internals to allow a contrib module to extend BigPipe with the ability to stream anonymous responses and prime Page Cache for subsequent visits

Issue #2712935 by Wim Leers, Fabianx, catch, alexpott: Messages are not rendered last, meaning those messages set within placeholders only appear on the next request

Issue #2678662 by Wim Leers, mondrake, Fabianx, alexpott: Ensure BigPipe does not break when HTML document contains CDATA sections or inline scripts matching certain patterns

Issue #2698811 by danmuzyka, Wim Leers, jhedstrom, Fabianx: BigPipe unnecessarily renders and sends multiple-occurrence placeholders multiple times when using JS — can cause JS errors

Issue #2702001 by olafkarsten, Wim Leers: Inject config factory for BigPipe (including in exception handlers)

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2678568 by Wim Leers: Ensure good UX & DX even when A) rendering of placeholder fails, B) some response event subscriber fails

Revert "Issue #2678568 by Wim Leers: Ensure good UX & DX even when A) rendering of placeholder fails, B) some response event subscriber fails"

This reverts commit eee35007.

Issue #2678568 by Wim Leers: Ensure good UX & DX even when A) rendering of placeholder fails, B) some response event subscriber fails

Issue #2670444 by Wim Leers: Embedded AJAX responses aren't application/json, but application/vnd.drupal-ajax

Issue #2469431 by Wim Leers, Fabianx, swentel, nod_, yched, dawehner, tstoeckler, catch, borisson_: BigPipe for auth users: first send+render the cheap parts of the page, then the expensive parts